JP2022158344A - Foam discharger - Google Patents

Abstract

To provide a foam discharger capable of preventing a cylinder valve from being positionally displaced by swelling, while securing excellent assembling workability of the cylinder valve.SOLUTION: A foam discharger 1 comprises a cylinder member 2, and an operation member 6 capable of discharging a content solution after forming foam via mixing with air by relatively moving in an upward-downward direction to a cylinder member 2. The cylinder member 2 has a cylinder valve 10 provided with a cylindrical body 10b and an annular valve body 10a connected to the cylindrical body 10b, and has an annular recess formed with an engaged face to which an inner peripheral face of the cylindrical body 10b is engaged, a reception face with which a lower face of the cylindrical body 10b comes into contact, that extends onto a radial direction outer side from the engaged face, and a restriction face capable of restricting expansive deformation of the cylindrical body 10b due to swelling by bringing the cylindrical body 10b into contact with an outer peripheral face, that extends upward from the reception face on the radial direction outer side than the engaged face. The foam discharger is provided with a ventilation passage communicating with an outside of the annular recess by passing through between the restriction face and the outer peripheral face of the cylindrical body 10b.SELECTED DRAWING: Figure 1

Description

The present invention relates to foam dispensers.

By vertically moving the actuating member relative to the cylinder member comprising the air cylinder and the liquid cylinder, the content liquid sucked into the liquid chamber from the container body is mixed with the air sent out from the air chamber to form bubbles. wherein the cylinder member has a cylinder valve comprising a cylindrical body and an annular valve body connected to the cylindrical body, the valve body opening the valve to allow air to flow into the air chamber and a valve-closed configuration that prevents the outflow of air from the air chamber, and the cylinder member has a fitted surface that is fitted to the inner peripheral surface of the cylindrical body. A container is known (see, for example, Patent Literature 1).

JP 2015-163518 A

In the conventional foam dispenser as described above, when the combination of the components of the liquid content and the material of the cylinder valve is inappropriate, the cylinder valve swells and deforms due to contact with the liquid content. The fitting strength of the inner peripheral surface of the cylindrical body of the cylinder valve with respect to the fitted surface is reduced, and there is a risk of displacement of the cylinder valve. Such displacement of the cylinder valve due to swelling is desirably suppressed because it may lead to deterioration of the valve function. Also, when considering a structure for suppressing the displacement of the cylinder valve, it is necessary to consider the assembling workability of the cylinder valve.

SUMMARY OF THE INVENTION It is an object of the present invention to solve such problems, and it is an object of the present invention to suppress displacement of the cylinder valve due to swelling while ensuring good assembling workability of the cylinder valve. To provide a foam dispenser capable of

The foam dispenser of the present invention comprises a cylinder member comprising an air cylinder and a liquid cylinder extending downward from the bottom wall of the air cylinder, an air piston cooperating with the air cylinder to form an air chamber, and the liquid cylinder. A liquid piston that cooperates to form a liquid chamber is provided, and by moving relative to the cylinder member in the vertical direction, the content liquid sucked into the liquid chamber from the container body is sent out from the air chamber. an actuating member capable of mixing with air to form a foam and discharging, wherein the cylinder member comprises a cylinder valve comprising a tubular body and an annular valve body connected to the tubular body, wherein the valve body comprises , between a valve open mode that allows air to flow into the air chamber through a vent provided in the bottom wall and a valve closed mode that prevents air from flowing out of the air chamber via the vent; and the cylinder member extends radially outward from the fitted surface to which the inner peripheral surface of the cylindrical body is fitted and contacts the lower surface of the cylindrical body. and a restricting surface extending upward from the receiving surface radially outward of the fitted surface and capable of restricting expansion deformation of the cylindrical body due to swelling by abutting against the outer peripheral surface of the cylindrical body. and a vent passage passing between the outer peripheral surface of the cylindrical body and the regulation surface and communicating with the outside of the annular recess. .

In the foam dispenser of the present invention having the above structure, it is preferable that the air passage has a longitudinal groove extending vertically on the regulation surface.

In the foam dispenser of the present invention having the above structure, it is preferable that the inner peripheral edge of the valve body is connected to the cylindrical body.

ADVANTAGE OF THE INVENTION According to this invention, the bubble dispenser which can suppress the positional displacement of a cylinder valve by swelling can be provided, ensuring the favorable assembly workability|operativity of a cylinder valve.

1 is a longitudinal sectional view showing a foam dispenser that is one embodiment of the present invention; FIG. FIG. 2 is an enlarged view of part A in FIG. 1; FIG. 3 is a diagram showing a modification of the ventilation path shown in FIG. 2;

Embodiments of the present invention will be exemplified below with reference to the drawings.

In this specification, the vertical direction means the direction along the central axis O of the air cylinder 20, the upward direction means the direction from the liquid cylinder 21 toward the air cylinder 20, and the downward direction means the opposite direction. The radial direction means the direction along a straight line orthogonal to the central axis O, the circumferential direction means the direction around the central axis O, and the longitudinal section means a cross section including the central axis O. .

A foam dispenser 1, which is an embodiment of the present invention shown in FIG. The cylinder member 2 has a cylinder body 8 , a suction pipe 9 and a cylinder valve 10 . The operating member 6 has a liquid piston 11 , a stem 12 , an air piston 13 , a discharge valve 14 , a valve holding member 15 , a foam member 16 and a push-down head 17 .

The foam discharger 1 forms a foam discharge container 19 in cooperation with the container body 18 by being attached to the mouth portion 18 a of the bottle-shaped container body 18 .

The cylinder body 8 is made of synthetic resin, and the cylinder valve 10 is made of rubber, elastomer or synthetic resin.

The content liquid is not particularly limited, but may be, for example, cosmetics, liquid soap, food, or the like.

The cylinder body 8 has an air cylinder 20 having a cylindrical peripheral wall 20a centered on the central axis O and a bottom wall 20b, and a liquid cylinder 21 extending downward from the inner peripheral edge of the bottom wall 20b. A suction pipe 9 is attached to the lower end of the liquid cylinder 21 and is integrally held. The cylinder main body 8 is fixed to the opening 18a by attaching the mounting cap 3 to the opening 18a.

The air piston 13 of the operating member 6 has an annular shape centered on the central axis O, and the relative movement of the operating member 6 in the vertical direction with respect to the cylinder member 2 (hereinafter also referred to as elevating operation). movement (also referred to as downward relative movement is referred to as a downward movement), the outer peripheral edge thereof can slide vertically on the inner peripheral surface of the peripheral wall 20a of the air cylinder 20, and cooperates with the air cylinder 20. form an air chamber 22 . The inner peripheral edge of the air piston 13 is held by the stem 12 so as to be relatively movable in the vertical direction.

A peripheral wall 20a of the air cylinder 20 is provided with a through hole 20c for air replacement that is opened as the operating member 6 moves downward. Also, the bottom wall 20b of the air cylinder 20 is provided with a vent hole 20d. A cylinder valve 10 is provided in the air chamber 22 . The cylinder valve 10 has a valve open configuration that allows air to flow into the air chamber 22 through the ventilation hole 20d, and a valve closed configuration that prevents air from flowing out of the air chamber 22 through the ventilation hole 20d. It has an annular valve body 10a that can be elastically deformed therebetween.

The liquid piston 11 of the operating member 6 has an annular shape centered on the central axis O, and its outer peripheral edge slides vertically on the inner peripheral surface of the peripheral wall 20a of the liquid cylinder 21 as the operating member 6 moves up and down. It is possible and forms a liquid chamber 23 in cooperation with the liquid cylinder 21 . An inflow port 21 a is provided at the lower end of the liquid chamber 23 . The liquid piston 11 is attached to the lower end of the stem 12 and held integrally.

The suction valve 4 is composed of a poppet valve centered on the central axis O, and is held in the liquid chamber 23 so as to be relatively movable in the vertical direction.

The compression spring 5 is composed of, for example, a coil spring, and is provided in the liquid chamber 23 so as to generate an urging force that moves the operating member 6 upward.

The stem 12 has an annular shape centered on the central axis O and extends along the central axis O. As shown in FIG.

The discharge valve 14 is held between an outflow port 24 provided inside the stem 12 and the lower end of the valve pressing member 15 so as to be relatively movable in the vertical direction.

The foam member 16 is attached to the upper portion of the valve pressing member 15 and held integrally therewith.

The push-down head 17 is attached to the top of the stem 12 and held integrally therewith. The depressing head 17 has a laterally extending nozzle 17a and a top surface 17b which receives a depressing operation to move the actuating member 6 downward.

The mounting cap 3 includes an outer peripheral wall 3a that is attached to the outer peripheral surface of the mouth portion 18a and has a cylindrical shape coaxial with the mouth portion 18a, and an annular shape extending radially inward from the upper end of the outer peripheral wall 3a and centering on the central axis O. None, it has a top wall 3b that restricts the upward escape of the air piston 13, and a cylindrical wall 3c that extends upward from the inner peripheral edge of the top wall 3b.

The stopper 7 is detachably attached to the outer peripheral surface of the cylinder wall 3c by elastic deformation, and is arranged between the push-down head 17 and the top wall 3b in the vertical direction, thereby preventing the downward movement of the operating member 6. be able to. When the user intentionally raises and lowers the operating member 6, the stopper 7 is removed from the cylinder wall 3c.

The actuating member 6 is provided with a liquid flow path 25 extending from the liquid chamber 23 through the outlet 24 and the foam member 16 to the nozzle 17a, and from the air chamber 22 through between the inner peripheral edge of the air piston 13 and the outer peripheral surface of the stem 12. and an air channel 26 extending to a portion of the channel 25 upstream of the foam member 16 .

When the operating member 6 moves downward, the liquid contained in the liquid chamber 23 shrinks, the suction valve 4 closes the inlet 21a of the liquid chamber 23, and the discharge valve 14 opens the outlet 24, thereby bubbling. The air in the air chamber 22 is directed toward the member 16 and the air in the air chamber 22 collapses, the cylinder valve 10 closes the vent hole 20d, and the inner peripheral edge of the air piston 13 opens the upstream end of the air passage 26. directed toward the foam member 16 by the . As the content liquid and air pass through the foaming member 16, the content liquid becomes foam and is discharged from the nozzle 17a.

When the operating member 6 moves upward, the liquid contained in the container body 18 expands the liquid chamber 23, the suction valve 4 opens the inlet 21a of the liquid chamber 23, and the discharge valve 14 closes the outlet 24. , the air chamber 22 expands, the cylinder valve 10 opens the vent hole 20d, and the inner peripheral edge of the air piston 13 forms an air flow path 26. is directed into the air chamber 22 by closing the upstream end of the . Also, at this time, air is introduced into the container body 18 through the through hole 20c, and replaces the liquid discharged from the container body 18 with the air.

In this manner, the operating member 6 moves vertically relative to the cylinder member 2 to mix the content liquid sucked into the liquid chamber 23 from the container body 18 with the air sent out from the air chamber 22 . can be discharged in the form of foam.

Further, in this embodiment, the cylinder valve 10 has a cylindrical body 10b centered on the central axis O, and the inner peripheral edge of the valve body 10a continues to the cylindrical body 10b.

Further, as shown in FIG. 2, the bottom wall 20b of the cylinder member 2 includes a fitted surface 27 to which the inner peripheral surface of the cylindrical body 10b is fitted, and extends radially outward from the fitted surface 27. A receiving surface 28 against which the lower surface of the body 10b abuts, and a cylindrical body extending upward from the receiving surface 28 radially outwardly of the fitted surface 27 and caused by swelling that may occur due to contact with the content liquid depending on the components of the content liquid. It has an annular concave portion 30 formed by a regulating surface 29 capable of regulating expansion deformation of the cylinder 10b by abutting against the outer peripheral surface of the cylindrical body 10b. In this embodiment, the bottom wall 20b is provided with the fitted surface 27. However, the present invention is not limited to this. may be used as the fitted surface 27 .

A vent hole 20d composed of a plurality of holes arranged side by side at intervals in the circumferential direction is provided radially outside the annular recessed portion 30 . In addition, the number of holes forming the ventilation hole 20d can be appropriately set, and the ventilation hole 20d may be formed of a single hole. An annular valve seat 20e on which the valve body 10a can be seated is provided on the upper surface of the bottom wall 20b at a radially outer portion of the air hole 20d.

In addition, in this embodiment, the inner peripheral edge of the valve body 10a continues to the cylindrical body 10b. In this case, a vent hole 20d is provided radially inward of the annular recess 30, and a valve seat 20e is provided in a portion of the upper surface of the bottom wall 20b radially inward of the vent hole 20d.

Furthermore, in the present embodiment, when the cylindrical body 10b is inserted into the annular recess 30, the air in the annular recess 30 can be smoothly released, and the cylinder valve 10 can be assembled with ease. An air passage 31 is provided that communicates with the outside of the annular recess 30 through between the outer peripheral surface and the restricting surface 29 .

The ventilation path 31 also has a vertical groove 31a extending vertically on the regulation surface 29. As shown in FIG. Therefore, as shown in FIG. 2, the restricting surface 29 can be set so as to abut on the outer peripheral surface of the cylindrical body 10b in advance from the time of assembly. can be strongly regulated. Note that, as in the modification shown in FIG. 3, the ventilation path 31 may be configured without the vertical groove 31a.

According to the foam dispenser 1 of the present embodiment, the air passage 31 ensures good assembling workability of the cylinder valve 10 , and the restricting surface 29 can suppress displacement of the cylinder valve 10 due to swelling.

The present invention is not limited to the above-described embodiments, and can be modified in various ways without departing from the scope of the invention.

Therefore, the foam dispenser 1 of the embodiment described above can be modified in various ways, for example, as described below.

The foam dispenser 1 of the embodiment described above comprises a cylinder member 2 comprising an air cylinder 20 and a liquid cylinder 21 extending downward from a bottom wall 20b of the air cylinder 20, and an air chamber 22 formed in cooperation with the air cylinder 20. The liquid piston 11 cooperates with the air piston 13 and the liquid cylinder 21 to form the liquid chamber 23 , and moves vertically relative to the cylinder member 2 . and an operating member 6 capable of mixing the content liquid sucked inside with the air sent out from the air chamber 22 to form bubbles and discharging them, and the cylinder member 2 is an annular body 10b connected to the cylindrical body 10b. The valve body 10a has a valve open mode in which air is allowed to flow into the air chamber 22 through a vent hole 20d provided in the bottom wall 20b, and a vent hole 20d The fitted surface 27, which is elastically deformable between a valve closed configuration that prevents the outflow of air from the air chamber 22 via the , a receiving surface 28 extending radially outward from the fitted surface 27 and contacting the lower surface of the cylindrical body 10b, and a receiving surface 28 extending radially outward from the fitted surface 27 and upward from the receiving surface 28 due to swelling. It has an annular recess 30 formed by a regulating surface 29 capable of regulating expansion deformation of the cylindrical body 10b by abutting against the outer peripheral surface of the cylindrical body 10b. Various modifications are possible as long as the foam dispenser 1 is characterized by the provision of an air passage 31 communicating with the outside of the annular recess 30 therethrough.

In addition, the foam dispenser 1 of the above-described embodiment is preferably the foam dispenser 1 in which the ventilation path 31 has a longitudinal groove 31a extending vertically on the regulation surface 29. As shown in FIG.

Moreover, it is preferable that the foam dispenser 1 of the embodiment described above is a foam dispenser 1 in which the inner peripheral edge of the valve body 10a continues to the tubular body 10b.

Reference Signs List 1 foam dispenser 2 cylinder member 3 mounting cap 3a outer peripheral wall 3b ceiling wall 3c cylinder wall 4 suction valve 5 compression spring 6 operating member 7 stopper 8 cylinder main body 9 suction pipe 10 cylinder valve 10a valve body 10b cylinder body 11 liquid piston 12 stem 13 Air piston 14 Discharge valve 15 Valve holding member 16 Foaming member 17 Depressing head 17a Nozzle 17b Top surface 18 Container body 18a Mouth 19 Foam discharge container 20 Air cylinder 20a Peripheral wall 20b Bottom wall 20c Through hole 20d Vent hole 20e Valve seat 21 Liquid Cylinder 21a Inlet 22 Air chamber 23 Liquid chamber 24 Outlet 25 Liquid channel 26 Air channel 27 Fitting surface 28 Receiving surface 29 Regulating surface 30 Annular recess 31 Air passage 31a Vertical groove O Central axis

Claims (3)

a cylinder member comprising an air cylinder and a liquid cylinder extending downwardly from a bottom wall of the air cylinder;
An air piston that cooperates with the air cylinder to form an air chamber and a liquid piston that cooperates with the liquid cylinder to form a liquid chamber are provided, and the liquid piston moves vertically relative to the cylinder member. an actuating member capable of mixing the content liquid sucked into the liquid chamber from the container main body with the air sent out from the air chamber, forming a foam, and discharging the content liquid;
The cylinder member has a cylinder valve including a cylinder and an annular valve body connected to the cylinder,
The valve body has an open configuration in which air is allowed to flow into the air chamber through a vent provided in the bottom wall, and a closed configuration in which air is prevented from flowing out from the air chamber via the vent. and is elastically deformable between
The cylinder member has a fitted surface to which the inner peripheral surface of the cylindrical body is fitted, a receiving surface extending radially outward from the fitted surface and abutting the lower surface of the cylindrical body, and a restricting surface extending upward from the receiving surface radially outside the fitting surface and capable of restricting expansion deformation of the cylindrical body due to swelling by abutting against the outer peripheral surface of the cylindrical body; having a recess,
A foam dispenser, comprising: an air passage that communicates with the outside of the annular concave portion through between the outer peripheral surface of the cylindrical body and the restricting surface. 2. The foam dispenser of claim 1, wherein the air passage has a longitudinal groove extending vertically over the restricting surface. 3. The foam dispenser according to claim 1 or 2, wherein the inner peripheral edge of the valve body continues to the cylindrical body.

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